One Of several chronograph’s earliest utilizes was timing horse races, so naturally, the complication advanced when horses designed way for horsepower. Declaring the winner of the race to create the primary computerized chronograph in 1969 is contentious small business, so Zenith’s “El Primero” moniker is arguable. That’s the title from https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/